Rinnai A-rated infinity range for a low NOx infinite supply of safe hot water Dec 5, 2018 | Articles, Building Industry News, Building Services, Heating Systems, Controls and Management, Heating, Ventilation and Air Conditioning - HVAC, Plumbing, Posts, Sustainability & Energy Efficiency Rinnai claims to possess the most energy efficient, low NOx and cost-effective range of A-rated water heaters across a variety of load profiles. Read More